package xyz.dengjunbo.framework.proxy;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.reflect.Method;

/**
 * 切面代理
 */
public abstract class AspectProxy implements Proxy  {
    private static final Logger LOGGER = LoggerFactory.getLogger(AspectProxy.class);

    @Override
    public Object doProxy(ProxyChain proxyChain) throws Throwable {
        Object result = null;

        Class<?>cls = proxyChain.getTargetClass();
        Method method = proxyChain.getTatgetMethod();
        Object[]params = proxyChain.getMethodParams();

        begin();
        try {
            if (intercept(cls,method,params)){
                before(cls,method,params);
                result = proxyChain.doProxyChain();
                after(cls,method,params,result);
            }else {
                result = proxyChain.doProxyChain();
            }
        }catch (Exception e){
            LOGGER.error("proxy failure",e);
            error(cls,method,params,e);
            throw e;
        }finally {
            end();
        }
        return result;
    }
    public void begin(){

    }
    public boolean intercept(Class<?>cls,Method method,Object[]params)throws Throwable{
        return true;
    }
    public void before(Class<?>cls,Method method,Object[]params)throws Throwable{

    }
    public void after(Class<?>cls,Method method,Object[]params,Object result)throws Throwable{

    }
    public void error(Class<?>cls,Method method,Object[]params,Throwable e){

    }
    public void end(){}

}
